Ignorance of all things is an evil neither terrible nor excessive, nor yet the greatest of all; but great cleverness and much learning, if they be accompanied by a bad training, are a much greater misfortune.

I would by no means wish a daughter of mine to be a progeny of learning; I don't think so much learning becomes a young woman: for instance, I would never let her meddle with Greek, or Hebrew, or algebra, or simony, or fluxions, or paradoxes, or such inflammatory branches of learning; nor will it be necessary for her to handle any of your mathematical, astronomical, diabolical instruments; but... I would send her, at nine years old, to a boarding-school, in order to learn a little ingenuity and artifice: then, sir, she would have a supercilious knowledge in accounts, and, as she grew up, I would have her instructed in geometry, that she might know something of the contagious countries: this is what I would have a woman know; and I don't think there is a superstitious article in it.

The best results are achieved by using the right amount of effort in the right place at the right time. And this right amount is usually less than we think we need. In other words, the less unnecessary effort you put into learning, the more successful you'll be... the key to faster learning is to use appropriate effort. Greater effort can exacerbate faulty patterns of action. Doing the wrong thing with more intensity rarely improves the situation. Learning something new often requires us to unlearn something old.